The SRX is the brand’s small SUV and the XTS is the large luxury sedan introduced this year that’s being assembled for the Chinese market by Shanghai General Motors Co. Ltd., a joint venture with Shanghai Automotive Industry Corporation Group, or SAIC.

GM, the largest U.S. automaker, said it has sold 30,000 luxury Cadillac SLS's -- the Asian version of the STS mid-sized luxury sedan introduced in China in 2009 -- because of China’s steep taxes on V6 engines. Despite the Chinese government’s big-engine tax, GM says it plans to produce 100,000 units a year by 2016.

The Chinese market for luxury cars has grown in recent year to 8.5 percent of total vehicle sales, the China Association of Automobile Manufacturers says. GM sells eight brands in China, including Buick, Opel, Wuling and Baojun. The company recently began showing commercials, featuring actor Brad Pitt: